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1 /* | 1 /* |
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef _WEBRTC_BASE_CRYPTSTRING_H_ | 11 #ifndef WEBRTC_RTC_BASE_CRYPTSTRING_H_ |
12 #define _WEBRTC_BASE_CRYPTSTRING_H_ | 12 #define WEBRTC_RTC_BASE_CRYPTSTRING_H_ |
13 | 13 |
14 #include <string.h> | 14 #include <string.h> |
15 | 15 |
16 #include <memory> | 16 #include <memory> |
17 #include <string> | 17 #include <string> |
18 #include <vector> | 18 #include <vector> |
19 | 19 |
20 namespace rtc { | 20 namespace rtc { |
21 | 21 |
22 class CryptStringImpl { | 22 class CryptStringImpl { |
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67 // Used for constructing strings where a password is involved and we | 67 // Used for constructing strings where a password is involved and we |
68 // need to ensure that we zero memory afterwards | 68 // need to ensure that we zero memory afterwards |
69 class FormatCryptString { | 69 class FormatCryptString { |
70 public: | 70 public: |
71 FormatCryptString() { | 71 FormatCryptString() { |
72 storage_ = new char[32]; | 72 storage_ = new char[32]; |
73 capacity_ = 32; | 73 capacity_ = 32; |
74 length_ = 0; | 74 length_ = 0; |
75 storage_[0] = 0; | 75 storage_[0] = 0; |
76 } | 76 } |
77 | 77 |
78 void Append(const std::string & text) { | 78 void Append(const std::string & text) { |
79 Append(text.data(), text.length()); | 79 Append(text.data(), text.length()); |
80 } | 80 } |
81 | 81 |
82 void Append(const char * data, size_t length) { | 82 void Append(const char * data, size_t length) { |
83 EnsureStorage(length_ + length + 1); | 83 EnsureStorage(length_ + length + 1); |
84 memcpy(storage_ + length_, data, length); | 84 memcpy(storage_ + length_, data, length); |
85 length_ += length; | 85 length_ += length; |
86 storage_[length_] = '\0'; | 86 storage_[length_] = '\0'; |
87 } | 87 } |
88 | 88 |
89 void Append(const CryptString * password) { | 89 void Append(const CryptString * password) { |
90 size_t len = password->GetLength(); | 90 size_t len = password->GetLength(); |
91 EnsureStorage(length_ + len + 1); | 91 EnsureStorage(length_ + len + 1); |
92 password->CopyTo(storage_ + length_, true); | 92 password->CopyTo(storage_ + length_, true); |
93 length_ += len; | 93 length_ += len; |
94 } | 94 } |
95 | 95 |
96 size_t GetLength() { | 96 size_t GetLength() { |
97 return length_; | 97 return length_; |
98 } | 98 } |
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114 for (;;) { | 114 for (;;) { |
115 capacity_ *= 2; | 115 capacity_ *= 2; |
116 if (capacity_ >= n) | 116 if (capacity_ >= n) |
117 break; | 117 break; |
118 } | 118 } |
119 | 119 |
120 storage_ = new char[capacity_]; | 120 storage_ = new char[capacity_]; |
121 | 121 |
122 if (old_capacity) { | 122 if (old_capacity) { |
123 memcpy(storage_, old_storage, length_); | 123 memcpy(storage_, old_storage, length_); |
124 | 124 |
125 // zero memory in a way that an optimizer won't optimize it out | 125 // zero memory in a way that an optimizer won't optimize it out |
126 old_storage[0] = 0; | 126 old_storage[0] = 0; |
127 for (size_t i = 1; i < old_capacity; i++) { | 127 for (size_t i = 1; i < old_capacity; i++) { |
128 old_storage[i] = old_storage[i - 1]; | 128 old_storage[i] = old_storage[i - 1]; |
129 } | 129 } |
130 delete[] old_storage; | 130 delete[] old_storage; |
131 } | 131 } |
132 } | 132 } |
133 | 133 |
134 ~FormatCryptString() { | 134 ~FormatCryptString() { |
135 if (capacity_) { | 135 if (capacity_) { |
136 storage_[0] = 0; | 136 storage_[0] = 0; |
137 for (size_t i = 1; i < capacity_; i++) { | 137 for (size_t i = 1; i < capacity_; i++) { |
138 storage_[i] = storage_[i - 1]; | 138 storage_[i] = storage_[i - 1]; |
139 } | 139 } |
140 } | 140 } |
141 delete[] storage_; | 141 delete[] storage_; |
142 } | 142 } |
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157 std::string UrlEncode() const override; | 157 std::string UrlEncode() const override; |
158 CryptStringImpl* Copy() const override; | 158 CryptStringImpl* Copy() const override; |
159 void CopyRawTo(std::vector<unsigned char>* dest) const override; | 159 void CopyRawTo(std::vector<unsigned char>* dest) const override; |
160 | 160 |
161 private: | 161 private: |
162 std::string password_; | 162 std::string password_; |
163 }; | 163 }; |
164 | 164 |
165 } | 165 } |
166 | 166 |
167 #endif // _WEBRTC_BASE_CRYPTSTRING_H_ | 167 #endif // WEBRTC_RTC_BASE_CRYPTSTRING_H_ |
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